Recent content by andyenergy

Carbon 0.20 max Silicon 0.10 - 0.40 Manganese 0.80 / 1.40 Phos & Sulphur 0.040 max Chromium 0.25 max Molybdenum 0.10 max Nickel 0.40 max Copper 0.30 max Niobium 0.01 - 0.06 Ni+Cr+Mo+cu = 0.80% Supplied in various conditions. Normalised...

Forgive me if this is the wrong forum, but it seems like the most appropriate place to start. I work for a large utility that raises steam for electrity generation in the UK. I get enquiries from time regarding the installation of hot waters systems that run from our oil fired auxiliary boilers...

The table reads: Test piece diameter D>25 (for test piece tube diameters greater than 25 mm) Range of qualification >=0.5 X D (25 mm min) - The range qualified is greater than or equal to 0.5 times the test piece diameter, but that the minimum diameter qualified is restricted to 25 mm...

Not really my area, but I dug out some info that might help. For hardening, 820 - 850C Oil quench. Temper for 100 ton condition (Z) 180 - 250C (air cool) For other conditions 550 - 660C (air cool) The differences between the temper conditions S - Y are only 5 tons on UTS for each condition...

I've had these guidelines for some time but never implemented them. See if they are any use. I suspect that some tweaking might be required depending on material. Hope it's useful. Failing that, why nt get in touch with AMI - in the UK they have been helpful at providing 'ballpark' values for...

The Welding Institute almost certainly would offer this service. Might be a bit pricey though...

BS 1501-151-23A is a carbon steel boiler plate. The 23A bit refers to UTS minimum of 23 Tons/in2 and yield of 13.1. Max carbon of 0.18%. EN 10028 Part 7 is for stainless steels. An appropriate equivalent would be EN 10028 Part 2 (flat products made for pressure purposes, Part 2 non-alloy...

I'm sort of hijacking this thread a little... I agree that normally preheating is not required (or desirable) for welding austenitic stainless steels. Preheat may however be required for other stainless steels in the martensitic series. It is therefore necessary to know what grade of stainless...

I'm back, refreshed but wishing I was still on that boat in the Indian Ocean.... Thanks for all your contibutions. Many of the observations are similar to thoughts that I'd had myself. Metengr - Many of our problems also relate to workmanship issues and the difficulty in carrying out an...

I'd like some views from some of the experts on this forum if possible. Bearing in mind I'm just about to go on holiday for a couple of weeks, I won't be able to respond to any queries you may have but I'd like to gather opinion in the first instance. I have been seeing a possible increase in...

Wow! Thanks metengr. Are you tied into your chair? I guessed you might be the one that replied, but not so quickly. And twice! Thanks again!! Andy

I've looked and looked but am struggling to find any recommendations for the tempering of a 420 weld metal deposited using a MIG/MAG process. Can anyone help?

Even the very old BS 3059 specification contained designations for the steels. CDS cold drawn seamless, ERW Electric Resistance Welded, HF Hot Finsished Seamless. CEW Cold Finished Electric Resistance Welded. Then there were the grades - 33, 45 (min ultimate tensile strength of tons per sq...

unclesyd - Thanks! Always good to get a more complete story. very useful indeed.

Thanks metengr. That's exactly what I thought too. Most of time branches that I see are separated quite well, but in this case someone had picked up this clause and i had to do a bit of head scratching yesterday. Thanks again.